03711cas|a2200433 i 4500 20260817162952.0 230399s1993 th uzm rtt 00| a1eng d .b10089135 AIT Thesis no.EV-93-31 Tran Thi Hong Nhien Application of the BIOSTYR process in domestic wastewater treatment Bangkok : Asian Institute of Technology, 1993 107 leaves + 1 online resource Thesis ; no. EV-93-31 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1993 A biological aerated filter combines bacterial degradation of pollutant by fixed biomass with physical filtration in a single reactor. An organic removal process has been operated on an experimental basis at a pilot plant over five months at the AIT - Environmental Engineering Division Laboratory. The wastewater feed was modified AIT domestic wastewater. The process consists of a granular media bed, particularly of polystyrene (thus, named biostyr process) with a specific gravity of approximately 0.06. The cylindial reactor was 4 m high and 0.2 m diameter. Headloss measurement was studied as a function of wastewater temperature, velocity and time. Experiments were conducted at 30°C, 38°C, 45°C and 55°C with velocities of 2 m/h, 4 m/h, 6 m/h and 8 m/h respectively. At 38°C, filtration time range was 5.5-10 hours and over 84% of the soluble COD was removed at all velocities investigated. At 30°C, 75.8- 89.4% COD removal was noticed, 89.4% COD removal with the exception of 6 m/h velocity and 8.5 hour filtration time. At 45 °C, 77.1-87.9% of soluble COD was removed, in which 87.9% COD removal could be obtained at 2 m/h velocity with a filtration time of 40 hours. A decreasing gradient of biomass from bottom to top of the reactor was observed. 2- 5.8% of purified water was consumed for backwashing operation. The optimal suspended solids removal occurred at 30°C with 6 m/h velocity. At lower temperature, maximum suspended solid removal could be obtained. The results indicated that effluent SS could be less than 30 mg/L, that is secondary treatment effluent standard in Thailand. Sewage Purification Biological treatment Visvanathan, C., Chairperson Chongrak Polprasert, Examination Committee Fujii, Shigeo, Examination committee Swedish International Development Agency (SIDA), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-93-31 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B16681 .b10089135 mnait x 250327 2 951012 m a x 0 mnait mnait mnarc mnarc 20 40 Barcode : 30050002588209 CREATED : 1994-05-16 RECORD # : i10095238 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050002932563 CREATED : 1994-05-16 RECORD # : i1009524x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160055652 CREATED : 2016-11-05 RECORD # : i12975230 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120933618 CREATED : 2019-11-28 RECORD # : i13234353 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 6870 6870 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no.EV-93-31 30050002588209 2026-08-17 16:29:52 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no.EV-93-31 30050002932563 2026-08-17 16:29:52 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-93-31 30050160055652 2026-08-17 16:29:52 2026-08-17 40 0 0 0 0 MAIN MAIN mnarc 2026-08-17 50.00 0 AIT Thesis no.EV-93-31 30050120933618 2026-08-17 16:29:52 3 2026-08-17 20